US 11,745,743 B2
Method for operating a motor vehicle, control device, and motor vehicle
Marc Kropf, Ingolstadt (DE); Christian Graf, Ingolstadt (DE); and Bernd Schäfer, Kipfenberg (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Filed by AUDI AG, Ingolstadt (DE)
Filed on Apr. 27, 2021, as Appl. No. 17/241,619.
Claims priority of application No. 102020119553.2 (DE), filed on Jul. 24, 2020.
Prior Publication US 2022/0024457 A1, Jan. 27, 2022
Int. Cl. B60W 30/18 (2012.01); B60W 50/08 (2020.01); B60W 50/00 (2006.01)
CPC B60W 30/18009 (2013.01) [B60W 50/085 (2013.01); B60W 2050/004 (2013.01); B60W 2710/0666 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for operating a motor vehicle, the motor vehicle comprising a control device and a drive train, wherein the drive train includes a motor which is coupled to at least one wheel via a clutch, and wherein the control device is configured to control, using a model which maps the drive train, a rotational speed of the at least one wheel to meet a target rotational speed by influencing a torque generated by the motor based on at least one state variable of the drive train, the method comprising: evaluating switching state information which describes a switching state of the clutch, correcting the at least one state variable according to the switching state information such that: when the switching state information describes the clutch as closed, the at least one state variable is corrected with a measured actual rotational speed of the motor and/or a measured actual rotational speed of the at least one wheel, and when the switching state information describes the clutch as at least partially open, the at least one state variable is corrected with the measured actual rotational speed of the at least one wheel and not with the measured actual rotational speed of the motor, initiating a torque intervention when the at least one state variable and/or the measured actual rotational speed of the at least one wheel exceed the target rotational speed during a shifting process in which the shifting state information describes the clutch as at least partially open, and identifying a fault in the clutch when the measured actual rotational speed of the at least one wheel does not respond to the torque intervention consistent with the target rotational speed in the model.